A New Characteristic Index BT of the Humidity Controlling Material in a Greenhouse Space and its Theoretical Basis

2012 ◽  
Vol 503-504 ◽  
pp. 251-257
Author(s):  
Chun Long Li ◽  
Wei Chen ◽  
Zheng Yang Li ◽  
Feng Lan Wei
Keyword(s):  
Phase Equilibrium ◽  
Binding Energy ◽  
Theoretical Basis ◽  
Pure Water ◽  
Water Molecules ◽  
Closed Space ◽  
Two Phase ◽  
Basic Principles ◽  
Characteristic Index ◽  
The Subject

In this essay, the charactristc index of the humidity controlling material is breifly illuminated, based on which, an observing experiment in a small enclosed box is made. According to the experimental phenomenon and the basic principles of the thermodynamics, the formulation of the humidity parameter in a closed space of greenhouse is derived, from the angle of two-phase equilibrium. We assert that the purpose of using B,the charateristic parameter, is to ensure that the temperature of the subjest is zero. So when the temperature is not zero, using this parameter will cause error. Since the imperfection of B, it is necessary to use another parameter, BT, which is derived according to the temperature of the subject and proved more reasonable, to reply the former one. Both parameters can reflect the combination of the material and the moisture, which relate to the binding energy. The humidity controlling character proves better, if the binding energy becomes closer to that of two pure water molecules.

scholarly journals An Accurate Model to Calculate CO2 Solubility in Pure Water and in Seawater at Hydrate–Liquid Water Two-Phase Equilibrium

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 393
Author(s):  
Mengyao Di ◽  
Rui Sun ◽  
Lantao Geng ◽  
Wanjun Lu
Keyword(s):  
Experimental Data ◽  
Phase Equilibrium ◽  
Liquid Water ◽  
Model Comparison ◽  
Pure Water ◽  
Co2 Storage ◽  
Co2 Solubility ◽  
Two Phase ◽  
Hydrate Phase ◽  
Water Equilibrium

Understanding of CO2 hydrate–liquid water two-phase equilibrium is very important for CO2 storage in deep sea and in submarine sediments. This study proposed an accurate thermodynamic model to calculate CO2 solubility in pure water and in seawater at hydrate–liquid water equilibrium (HLWE). The van der Waals–Platteeuw model coupling with angle-dependent ab initio intermolecular potentials was used to calculate the chemical potential of hydrate phase. Two methods were used to describe the aqueous phase. One is using the Pitzer model to calculate the activity of water and using the Poynting correction to calculate the fugacity of CO2 dissolved in water. Another is using the Lennard–Jones-referenced Statistical Associating Fluid Theory (SAFT-LJ) equation of state (EOS) to calculate the activity of water and the fugacity of dissolved CO2. There are no parameters evaluated from experimental data of HLWE in this model. Comparison with experimental data indicates that this model can calculate CO2 solubility in pure water and in seawater at HLWE with high accuracy. This model predicts that CO2 solubility at HLWE increases with the increasing temperature, which agrees well with available experimental data. In regards to the pressure and salinity dependences of CO2 solubility at HLWE, there are some discrepancies among experimental data. This model predicts that CO2 solubility at HLWE decreases with the increasing pressure and salinity, which is consistent with most of experimental data sets. Compared to previous models, this model covers a wider range of pressure (up to 1000 bar) and is generally more accurate in CO2 solubility in aqueous solutions and in composition of hydrate phase. A computer program for the calculation of CO2 solubility in pure water and in seawater at hydrate–liquid water equilibrium can be obtained from the corresponding author via email.

Basic Principles and New Methods on Emotional Product Design

2012 ◽  
Vol 452-453 ◽  
pp. 437-440
Author(s):  
Min Huang ◽  
Hong Juan Qiao
Keyword(s):  
Quantitative Analysis ◽  
Product Design ◽  
Theoretical Basis ◽  
Design Methods ◽  
Shape Design ◽  
Emotional Design ◽  
Kansei Engineering ◽  
Basic Principles ◽  
New Methods ◽  
Product Technology

Emotional design is one of the most important methods in modern product design. It was highlighted after Donald A. Norman published his book Emotional design: why we love (or hate) everyday things. Emotional design addresses people’s needs and hopes which is in the center of the development of product design and product technology. Due to the lack of strong theoretical basis and quantitative analysis, many products can’t reach the goal of their designers with Emotional feelings, nor can consumer’s emotional understandings be similar to the designers’ emotional expectations. This paper analyzes the concept of emotional design and some difficulties which designers must to be faced in their emotional designing works, discusses on product shape design according to emotional design. On this basis, the Kansei engineering and emotional design methods are described in details.

Phase Equilibrium of Mg-Nd-Zn System near Mg-Nd Side at 400°C

2016 ◽  
Vol 873 ◽  
pp. 18-22
Author(s):  
Ming Li Huang ◽  
Xue Shen ◽  
Hong Xiao Li
Keyword(s):  
Solid Solution ◽  
Phase Equilibrium ◽  
Ternary Isothermal Section ◽  
Phase Region ◽  
X Ray Diffraction ◽  
Maximum Solubility ◽  
Two Phase ◽  
Solubility Range ◽  
Three Phase ◽  
Equilibrium Alloys

The equilibrium alloys closed to Mg-Nd side in the Mg-rich corner of the Mg-Zn-Nd system at 400°C have been investigated by scanning electron microscopy, electron probe microanalysis and X-ray diffraction. The binary solid solutions Mg12Nd and Mg3Nd with the solubility of Zn have been identified. The maximum solubility of Zn in Mg12Nd is 4.8at%, and Mg12Nd phase can be in equilibrium with Mg solid solution. However, only when the solubility range of Zn in 26at%~32.2at%, Mg3Nd can be in two-phase equilibrium with Mg solid solution. As the results, two two-phase regions as Mg+Mg12Nd and Mg+Mg3Nd and a three-phase region as Mg+Mg12Nd+Mg3Nd in Mg-Nd-Zn ternary isothermal section at 400°C have been identified.

CONDUCTANCES OF LITHIUM NITRATE SOLUTIONS IN ETHYL ALCOHOL AND ETHYL ALCOHOL - WATER MIXTURES AT 25.0 °C.

1956 ◽  
Vol 34 (9) ◽  
pp. 1232-1242 ◽  
Author(s):  
A. N. Campbell ◽  
G. H. Debus
Keyword(s):  
No Value ◽  
Ethyl Alcohol ◽  
Pure Water ◽  
Lithium Ion ◽  
Water Molecules ◽  
Lithium Nitrate ◽  
Absolute Alcohol ◽  
Pure Alcohol ◽  
Alcohol Water ◽  
Nitrate Solutions

The conductances of solutions of lithium nitrate in 30, 70, and 100 weight per cent ethyl alcohol have been determined at concentrations ranging from 0.01 molar up to saturation, at 25 °C. The densities and viscosities of these solutions have also been determined. The data have been compared with the calculated conductances obtained from the Wishaw–Stokes equation. The agreement is fairly good up to, say, 2 M, for all solvents except absolute alcohol. In the latter solvent there is no value of å, the distance of closest approach, which will give consistent values of the equivalent conductance. In passing from pure water to pure alcohol, the value of å increases progressively and this we attribute to a change in the solvation of the lithium ion from water molecules to alcohol molecules. Some further calculations incline us to the view that the nitrate ion, as well as the lithium ion, is solvated to some extent, at least in alcohol.

main principles and directions of socio-cultural re-socialization of foreign students

2021 ◽  
Vol 7 (Extra-E) ◽  
pp. 327-335
Author(s):  
Hoshang Farhad Abdullah
Keyword(s):  
Foreign Students ◽  
Social Space ◽  
Internal State ◽  
Social Adaptation ◽  
Host Society ◽  
Small Cities ◽  
Institutional Practices ◽  
Basic Principles ◽  
The Social ◽  
The Subject

The purpose of the article is to investigate the basic principles and directions of socio-cultural re-socialization of foreign students. The subject of the research is the institutional practices of re-socialization of foreign students in the conditions of a megalopolis (on the example of Moscow). The results of the work are that the author has studied the basic principles and directions of socio-cultural re-socialization of foreign students, they include 2 components, one of which provides the necessary conditioning of the internal state of a person for entering the host society, and the second-actually entering society through following certain trajectories in the social space. Thus, Russian megacities as places of subsequent social adaptation of foreign students are full of more opportunities for successful re-socialization of a criminal than small cities, but they are not without risks.

scholarly journals Two-phase equilibrium in binary and ternary systems II. The system methane-ethylene III. The system methane-ethane-ethylene

1940 ◽  
Vol 176 (964) ◽  
pp. 140-152 ◽  
Keyword(s):  
Phase Equilibrium ◽  
Ternary System ◽  
Binary Systems ◽  
Ternary Systems ◽  
Two Phase ◽  
Composition Diagram ◽  
Wide Range ◽  
Binary And Ternary Systems

The liquid-vapour equilibrium of the system methane-ethylene has been determined at 0, -42 , -78, -88 and -104° C over a wide range of pressures and the results are shown on a pressure-composition-temperature diagram and by a series of pressure-composition curves. The liquid-vapour equilibrium of the ternary system methane-ethane-ethylene has been determined at -104, -78 and 0° C. Values for the two binary systems methane-ethane and methane-ethylene and for the ternary system methane-ethane-ethylene are shown on a composite pressure-composition diagram.

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